Question

Multiply the binomials using the FOIL method.

(b - 3)(b + 9)

A. b^2 + 6b - 27


B. b^2 - 6b - 27


C. b^2 - 27


D. b^2 + 12b - 27

Answer 1

FOIL= first, outside, inside, and last
It will help you a lot in distribution problems.
(b-3)(b+9)
b^2+9b-3b-27
b^2+6b-27
A.
Hope this helps :)

Answer 2

foil is just like distributive meathod rememebering meathood

so foil is
First
Outer
Inner
Last

so if you had
(a+b)(c+d)
you would do
First
a times c
Outer
a times d
Inner
b times c
Last
b times d so



we have
(b-3)(b+9)
FIRST
b times b=b^2
Outer
b times 9=9b
Inner
-3 times b=-3b
Last=-3 times 9=-27
add

b^2+9b-3b-27
add like terms
b^2+6b-27
answer is A